[Xen-API] Upgrading xcp 1.6 to xenserver 6.2 issues

[Nathan March <nathan@xxxxxx>]

Hi All,

Upgraded one of our clusters from xcp 1.6 to xenserver 6.2 just fine, 
but trying to do one of our others and I'm running into a whole slew of 
weird problems.
Steps I did:

- With host #1 as the master, upgraded #3 to 6.2
- #3 lost access to the pool, was unable to get it resolved. Would show 
no network cards in xsconsole, even though ifconfig showed up fine and 
networking worked as well.
- Rebuilt host #3 as a brand new xs 6.2 install
- Tried to add to the pool, failed since it's a newer version. Logical 
enough.
- Promoted host #4 to be the master
- Rebooted #4 without promoting another host to master, then upgraded it 
to xs 6.2
At this point things appear to be working with the master host #4 on 6.2 
and the rest are on 1.6.
Now the interesting things:

1) When I do a "xe-toolstack-restart" on the upgraded #4, xapi won't 
launch (bails out with errcode 1) and I can't see anything useful in the 
logs. Stracing xapi doesn't seem to reveal anything useful either. 
Rebooting the host restores everything fine.
2) Trying to add host #3 into the pool results in: "There was a problem 
with the license daemon (v6d). Is it running?" I've checked and v6d 
isn't running anywhere, nor is it running on my other 6.2 cluster. I 
assume this is a commercial xen daemon and not part of the opensource 
xenserver, but I'm not sure why it's trying to look for it?
I've reverted things back to 6.1 for now and will take another stab at 
this tomorrow, but anyone have any ideas on what I'm doing wrong?
Thanks!

- Nathan

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